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Implementing in memory response cache

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This commit is contained in:
Ara Sadoyan
2026-07-20 12:25:27 +02:00
parent c89fe48e44
commit b73ccc527f
8 changed files with 94 additions and 7 deletions
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src/utils/metrics.rs
+14
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@@ -1,3 +1,5 @@
use crate::utils::lazylock::EVICTION;
use pingora_cache::eviction::EvictionManager;
use pingora_http::Method;
use pingora_http::StatusCode;
use pingora_http::Version;
@@ -20,6 +22,11 @@ pub static MEMORY_USAGE: LazyLock<IntGauge> = LazyLock::new(|| register_int_gaug
pub static ACTIVE_SESSIONS: LazyLock<IntGauge> = LazyLock::new(|| register_int_gauge!("aralez_active_sessions", "Current number of active sessions").unwrap());
pub static REQUEST_COUNT: LazyLock<IntCounter> = LazyLock::new(|| register_int_counter!("aralez_requests_total", "Total number of requests handled by Aralez").unwrap());
pub static CACHE_SIZE_BYTES: LazyLock<IntGauge> = LazyLock::new(|| register_int_gauge!("aralez_cache_size_bytes", "Current cache size in bytes").unwrap());
pub static CACHE_ITEMS: LazyLock<IntGauge> = LazyLock::new(|| register_int_gauge!("aralez_cache_items", "Current number of cached objects").unwrap());
pub static CACHE_EVICTED_BYTES: LazyLock<IntGauge> = LazyLock::new(|| register_int_gauge!("aralez_cache_evicted_bytes_total", "Total bytes evicted from cache").unwrap());
pub static CACHE_EVICTED_ITEMS: LazyLock<IntGauge> = LazyLock::new(|| register_int_gauge!("aralez_cache_evicted_items_total", "Total cache items evicted").unwrap());
pub static RESPONSE_CODES: LazyLock<IntCounterVec> =
LazyLock::new(|| register_int_counter_vec!("aralez_responses_total", "Responses grouped by status code", &["status"]).unwrap());
@@ -55,6 +62,13 @@ pub fn calc_metrics(metric_types: &MetricTypes) {
REQUESTS_BY_METHOD.with_label_values(&[metric_types.method.as_str()]).inc();
REQUESTS_BY_UPSTREAM.with_label_values(&[metric_types.upstream.as_ref()]).inc();
RESPONSE_LATENCY.observe(metric_types.latency.as_secs_f64());
if let Some(eviction) = EVICTION.get() {
CACHE_SIZE_BYTES.set(eviction.total_size() as i64);
CACHE_ITEMS.set(eviction.total_items() as i64);
CACHE_EVICTED_BYTES.set(eviction.evicted_size() as i64);
CACHE_EVICTED_ITEMS.set(eviction.evicted_items() as i64);
}
}
pub(crate) fn get_memory_usage() -> usize {